<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li :class="currentOne == -1 ? 'current': ''" @click="chooseOneSubject(null,-1)">
                  <a title="全部" href="#">全部</a>
                </li>
                <li v-for="(subject,index) in subjectList" :key="subject.id" @click="chooseOneSubject(subject.id,index)" :class="currentOne == index ? 'current': ''">
                  <a :title="subject.title" href="#">{{subject.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li :class="currentTwo == -1 ? 'current': ''" @click="chooseTwoSubject(null,-1)">
                  <a title="全部" href="#">全部</a>
                </li>
                <li v-for="(item,index) in subjectListTwo" :key="item.id" @click="chooseTwoSubject(item.id,index)" :class="currentTwo == index ? 'current': ''">
                  <a :title="item.title" href="#">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl">
            <ol  class="js-tap clearfix">
              <li :class="currentThree == -1 ? 'current bg-orange': ''" @click="handle">
                <a title="默认" href="#">默认</a>
              </li>
              <li :class="currentThree == 0 ? 'current bg-orange': ''" @click="handleOne">
                <a title="关注度" href="#">关注度</a>
              </li>
              <li :class="currentThree == 1 ? 'current bg-orange': ''" @click="handleTwo">
                <a title="最新" href="#">最新</a>
              </li >
              <li :class="currentThree == 2 ? 'current bg-orange': ''" @click="handleThree">
                <a title="价格" href="#">价格&nbsp;
                  <span>↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total == 0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article class="comm-course-list" v-if="data.total > 0">
            <ul class="of" id="bna">
              <li v-for="course in data.records" :key="course.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="course.cover" class="img-responsive" :alt="course.title">
                    <div class="cc-mask">
                      <a :href="'/course/'+course.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+course.id" :title="course.title" class="course-title fsize18 c-333">{{course.title}}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span class="fr jgTag bg-green">
                      <i class="c-fff fsize12 f-fA">{{course.price}}</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                      <i class="c-999 f-fA">{{course.buyCount}}人学习</i>
                      |
                      <i class="c-999 f-fA">{{course.viewCount}}评论</i>
                    </span>
                  </section>
                </div>
              </li>
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{ undisable: !data.hasPrevious }"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)"
              >首页</a
            >

            <a
              :class="{ undisable: !data.hasPrevious }"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current - 1)"
              >&lt;</a
            >

            <a
              v-for="page in data.pages"
              :key="page"
              :class="{
                current: data.current == page,
                undisable: data.current == page,
              }"
              :title="'第' + page + '页'"
              href="#"
              @click.prevent="gotoPage(page)"
              >{{ page }}</a
            >

            <a
              :class="{ undisable: !data.hasNext }"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current + 1)"
              >&gt;</a
            >

            <a
              :class="{ undisable: !data.hasNext }"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)"
              >末页</a
            >

            <div class="clear" />
          </div>
        </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
import courseApi from '@/api/course'
import { listToTreeList } from '@/utils/index'
export default {
  data() {
    return {
      query: {
        pageNum:1,
        pageSize:8,
        buyCountSort:null,
        gmtCreateSort:null,
        priceSort:null,
        subjectParentId:null,
        subjectId:null,
        teacherId:null,
        title:null,
      },
      data:{},
      subjectList:[],
      subjectListTwo:[],
      currentOne: -1,
      currentTwo: -1,
      currentThree: -1
    }
  },
  created () {
    this.getSubject()
    this.getList();
  },
  methods: {
    async getList() {
      let res = await courseApi.getCourseList(this.query);
      if(res.success){
        this.data = res.data
        console.log(this.data);
      }
    },
    gotoPage(page) {
      this.query.pageNum = page;
      this.getList()
    },
    // 获取课程分类
    async getSubject() {
      let res = await courseApi.getAllSubject()
      if(res.success) {
        let arr = res.data.list;
        this.subjectList = listToTreeList(arr)
        console.log(this.subjectList);
      }
    },
    chooseOneSubject(id,index) {
      this.query.subjectParentId = id;
      this.currentOne = index;
      this.subjectList.forEach(item => {
        if(item.id == id){
          this.subjectListTwo = item.children
        }
      })
    
      this.getList()
    },
    chooseTwoSubject(id,index) {
      this.query.subjectId = id;
      this.currentTwo = index
      this.getList()
    },
    handle() {
      this.query.buyCountSort = 1;
      this.query.gmtCreateSort = 1;
      this.query.priceSort = 1;
      this.currentThree = -1;
      this.getList()
    },
    handleOne() {
      this.query.buyCountSort = 1;
      this.currentThree = 0;
      this.getList()
    },
    handleTwo() {
      this.query.gmtCreateSort = 1;
      this.currentThree = 1;
      this.getList()
    },
    handleThree() {
      this.query.priceSort = 1;
      this.currentThree = 2;
      this.getList()
    },
    
  }
};
</script>